Chain pump.



J. E. MERWIN.

CHAIN PUMP.

APPLICATION FILED 11111.28, 1913.

1,098,953. Patented June 2, 1914.

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JAMES E. MERWIN, 0F SEATTLE, WASHINGTON.

CHAIN PUMP.

Specification of Letters Patent.

Patented June 2, 1914i.

Application filed April 28, 1913. Serial No. 764,204.

1770 all whom it may concern Be it known that I, JAMES, E. MnRwIN, acitizen of the United States of America, and a resident of the city ofSeattle, in the county of King and State of lflashington, have inventedcertain new and useful lmprovements in Chain Fumps, of which thefollowing is a specification.

My invention relates to chain pumps, the same having particularreference to that type wherein lthe water or other liquid is eievatedthrough a pipe by a series of pistons, and has for one of its objectsthe provision of a simplified construction which is efficient inoperation.

A further object resides in providing a novel means for locking theliquid elevating means against reverse movement when the latter hasstopped, and which is adapted to be automatically moved to aninoperative position, when the pump is set in motion, by the elevatedliquid.

lli/'ith the above and other objects to be refered to as my descriptionprogresses, my invention resides in the features of construction,arrangements and combinations of parts hereinafter described andsuccinctly defined in my annexed claims.

Referring to the accompanying drawing wherein like numerals of referenceindicate like parts throughout: Figure 1 is a side elevation of thepresent invention parts thereof being broken away for the salie ofelearness. Fig. 2 is a top plan view thereof parts being broken away.Fig. 3 is a perspective view of one of the pistons employed in myinvention, and Fig. l is a fragmentary side elevation of a slightlymodified construction.

Referring more particularly to the draw-l ing, 1 designates a frame `onwhich the pump is supported. Depending from the top of the frame 1 is anup-talre pipe 2 having the component parts thereof suitably secured, asby the bolts 3, and the lower terminal thereof flared outwardly tofacilitate the reeeption of the pistons 4t. These pistons, which conformto the contour of the pipe 2, are supported by a chain or cable 5 takingover a notched wheel 6 supported on the top of the frame 1 adjacent theupper terminal of the pipe 2 and over a second notched wheel 7 supportedby said pipe adjacent to its lower terminal.

rlhe shaft 8 which supports the wheel G carries on one terminal aratchet wheel 9 and on its opposite terminal a gear 10, the lattermeshing with a second gear 11 which is j Cooperating with the ratchet 9is a pawl` 14 which prevents a backward or reverse movement of the wheelG. `When thepump has been stopped the water in the pipe 2 supported bythe pistons 4 would under ordinary circumstances cause a reverse move*ment of the chain were it not for the pawl 14.

After starting the pump and when the same is in mot-ion, it has beenfound desirable to raise the pawl from engagement with the ratchet 9 andto accomplish this a certain novel construction is provided which isoperated by the elevated liquid and which when the liquid ceases to flowwill automatically return the pawl 14k into engagement with the ratchet9. This construction consists of a lever 15 mounted on the frame 1 andadaptedto engage beneath the pawl for raising the latter free from theratchet 9. The lower terminal of the lever 15 is connected by a link 16to an arm 17, the latter being rigidly secured on a shaft mounted formovement in a trough 18 communicating with the pipe 2 adjacent the upperterminal thereof. Within the trough 18 is mounted on this shaft adepressible plate 19 which is adapted to be `depressed by the elevatedliquid flowingl through the trough 18. Stops 20 are secured to the sidesof the trough 18 to limit the upward movement of the plate 19.

As will be seen in Fig. 1 the inner edges of pistons 4 are receivedwithin the notches of the wheel 6 to establish a driving connectionbetween the latter and the chain.

InV operation, the wheel 6 is driven by any source of power through thegears 10 and 11 whereby the chain 5 is caused to move in the directionof the arrow shown in Fig. 1. As the chain 5 moves upwardly through the11p-take pipe 2, the liquid is thereby elevated to the trough 18 and asit passes over the plate 19, the latter is depressed, and through theseveral connections the lever 15 raises the pawl 14 from engagement withthe ratchet.- 9. Upon stopping the pump and the water ceasing to flow,the weight of the link 16 and the arm 1'? will reverse the lever 15whereby the pawl 14 is brought into operative engagement with theratchet 9.

In the modification shown in Fig. i a float 21 is provided to performthe function of the depressible plate 19 described in F ig. 1, saidfloat being carried by a shaft mounted in the sides ot the trough 1S andon one )rotruding terminal of the shaft, is mountec an arm 2Q which isadapted to bear against the free terminal ct the paWl 23, the latterengaging the ratchet 9. ln the modilied construction, the Wheel 2d, overwhich the chain 5 takes, is provided with teeth to establish a drivingconnection between said chain and Wheel.

Having thus described my invention, What l claim new, and desire tosecure by Letters Patent of the United States of America, is

1. A. pump comprising a pipe, a pump chain operating therein and spacedfrom the inner Wall of the pipe, means for operating the chain, pistonscarried by the chain, and a positioning` arm projecting from each of thepistons for engagement With the .vall ot the pipe.

2. A pump comprising a pipe having an outlet, means for elevating aliquid in the pipe, a Wheel for operating the liquid ele vating means,means for preventing a reverse movement of said Wheel, and meansdisposed in the outlet ot the pipe and operable by the out-flowingliquid for releasing the second mentioned means.

8. A pump comprising a pipe, liquid elevating means in the pipe, a Wheelfor operating said means, a shaft supporting the Wheel, a ratchet on theshaft, a paWl cooperating vvith the ratchet to prevent a reverse.movement of the Wheel, and means operable by the elevated liquid torelease the pawl from the ratchet.

4. A pump comprising a pipe, means for elevating liquid therein, meansto prevent a reverse movement of the elevating means, and means operableby the elevated liquid for releasing the second mentioned means.

A pump comprising a pipe, a pump chain operating therein, a pistoncarried by the chain, spaced arms on the piston receiving the chaintherebetween, and adapted to bear on inner Wall of the pipe.

6. A pump comprising a pipe, means for elevating a liquid therein, andmeans normally preventing reverse movement of the elevating means andoperable by the elevated liquid to release the elevating meansaforesaid,

Signed at Seattle, Washington, this 4th day of April, 1913.

JAMES E. MERWN.

l/Vitnesses: Y

G. `W. MERWIN, WESLEY SAMUELS.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

